What it actually looks like
Self sabotage is not one behaviour, but rather a pattern. Something you say you want moves closer, and something you do moves it away again. Most people recognise at least one of these.
- Leaving things until there is no longer time to do them well
- Picking a fight, or going cold, when a relationship is going well
- Stopping something just as it starts to work
- Setting a standard so high that not starting feels safer
- Dismissing good news, or finding a flaw in it straight away
Why we do it
Rarely for one reason. But protection is usually somewhere in it, and that is the part that tends to get missed.
If failing on your own terms has ever felt safer than trying and being found wanting, then not-quite-trying is a shrewd defence. If being visible once brought criticism, staying small is sensible. If closeness has cost you before, pushing someone away at the point it starts to matter is not senseless; it is anticipating a familiar ending.
The strategy is old and it is doing a job. That is why deciding to stop rarely works on its own.
Why it is not laziness
People arrive at this word carrying a lot of self-blame, and the word itself does not help: "sabotage" implies you are working against yourself on purpose.
In practice the opposite is usually true. Someone who has been putting off one email for three weeks is generally not relaxed about it; they are spending far more energy avoiding it than the task would take. That is not indolence. It is a difficulty getting started that has something underneath it, most often anxiety, shame, or a fear of what happens if you do it and it still is not enough.
Research on procrastination has moved the same way. It is now generally treated as a problem of managing feelings rather than managing time, which is why advice built on discipline so often misses.
The role of shame
Shame is the engine in a lot of this, and it works in a loop. You avoid something, you feel bad about avoiding it, feeling bad makes the thing harder to face, so you avoid it again.
There is a distinction in the research between shame and guilt that matters here. Put simply, guilt is about something you did; shame is about who you feel you are. Guilt tends to move people toward repair, while shame tends to move them toward hiding, which is why blaming yourself for the avoidance can make it worse rather than better.
The loop is self-feeding, which is why willpower-based advice tends to fail. Adding more pressure to a system already running on shame usually produces more avoidance, not less.
What actually helps
Curiosity before correction. The useful question is not "why am I like this" but "what is this protecting me from". The behaviour usually starts to loosen once its job is understood.